It is well documented that the Carver M-1.5t sound was patterned after that of the Mark Levinson ML-2 and that the M-1.0t was patterned after a Conrad-Johnson Premier Four. What about the M-500t? What was the 'reference' amplifier that its sound was supposed to emulate? Interestingly, the M-500t manual simply states that "Your M-500t uses the T-mod technology originally developed for the Carver M-1.5t power amplifier." Does anyone know for sure? Thanks.

Rita told me that the "T" mod was an upgrade offered to the original "M" series amplifiers and were later put out as a second offering of basically the same amplifier. The original M-1.0 or M-1.5 could be sent back to the factory to be re-wired with monster cable and a couple resistor changes, which came that way in the later "T" models or M-1.0t & M-1.5t respectively. It had nothing to do with the transfer fuction calibration.

Well sure, but they put the stickers on right? I was referring to the "T" after the M-1.0 for example. That's what the "T" mod represents is the "UPGRADE" wheither it was actually done or not is really not the point I was trying to make. The M-1.0 was still transfer function calibrated, the "T" was the whole Monster Cable and resistor change. Atleast that's what I gathered through my conversation with Rita.

BillD wrote:IIRC, there was some 14 ga. Monster Cable used to go from the amplifier board to the binding posts. That's it.

And that was only on a very few models.

My M-1.5t has the 'Monster Cable improvement' (as evidenced by the decal on the rear panel) and it is just like Bill said - a short piece of 14 AWG cable going from the amplifier board to the binding post. It's just marketing...